CN110243244A - It is a kind of based on Detonation waveform modulation circumferential slit without cavity liner air gap CUMULATIVE BLASTING loading method - Google Patents
It is a kind of based on Detonation waveform modulation circumferential slit without cavity liner air gap CUMULATIVE BLASTING loading method Download PDFInfo
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- CN110243244A CN110243244A CN201910648596.9A CN201910648596A CN110243244A CN 110243244 A CN110243244 A CN 110243244A CN 201910648596 A CN201910648596 A CN 201910648596A CN 110243244 A CN110243244 A CN 110243244A
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- detonation
- circumferential
- air gap
- wave
- circumferential slit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a kind of circumferential slits based on Detonation waveform modulation without cavity liner air gap CUMULATIVE BLASTING loading method, in order to overcome conventional circumferential CUMULATIVE BLASTING device that need to configure cavity liner and be only used for the limitation of special blasting, the present invention is based on circumferential slit Detonation waveform modulation techniques, in common industrial explosive column charing detonation, building does not limit the circumferential slit air gap cumulative mechanism of number of rings, generation is different from conventional column charge detonation and is formed by column wave, multi-stage annular detonation wave air gap energy-gathering jetting is formed along powder charge axis, complex blast waves waveform is generated in ground, significantly increase impact wave pressure, draw (cutting) effect, to enhance explosive detonation local failure ability, improve the interaction of powder charge circumferential direction explosion energy concentration degree and adjacent shot hole charging explosion shock wave, reaching improves broken rock and soil effect and raising explosive energy Measure the purpose of utilization rate (or blast hole utilizing factor).
Description
Technical field
The present invention relates to a kind of circumferential slits based on Detonation waveform modulation without cavity liner air gap CUMULATIVE BLASTING powder charge
Method belongs to engineering explosion technical field, suitable for the industries such as mining, geotechnical engineering, water conservancy and hydropower, traffic engineering
Engineering explosion is particularly suitable for improving roadway and tunnel piercing Cut Blasting efficiency and air bench blasting reduces foundation, has
Broad application prospect.
Background technique
CN200310120891.6 patent discloses a kind of flat bullet of medium-length hole blasting cumulative and application method, it is characterized in that
In 4~8 band covers of circumferential setting of column type powder charge or without cover troughs for collecting energy or sockets for collecting energy, and seal its troughs for collecting energy or sockets for collecting energy.
The flat bullet need to specially make and the process is more complicated.A kind of circumferential linear shaped of CN201210230068.X patent report is cut
Cutter, the jet cutter include constraint shell, explosive, cavity liner and apparatus to cause bursting, and constraint shell is cylindrical tube, outside
Linear cavity liner equipped with multiple semicircle tubuloses in shell；The notch of pipe is towards the inner wall of shell and contact, and adjacent two
Semicircular pipe outer wall is tangent to each other, and length is identical as constraint shell, and axis is parallel to each other.It is substantially along the multiple of powder charge axis
Semicircle linear shaped cavity liner combination, the complicated manufacture difficulty of construction is larger, and the circumferential energy-gathering device in non-critical meaning.
CN201410218531.8 patent discloses circumferential discontinuous energy-gathering jetting fracturing device, outside tubular metal bullet case
The endless groove being parallel to each other is provided on disc, the shape of slot is taper or semicircle.The fracturing device metal bullet case need to specially roll
System even machining is to guarantee that cavity liner precision, application range are subject to certain restrictions.CN201020154765.8 patent discloses
A kind of annular energy gathering slot type flat explosion pack is placed with annular cumulative cavity liner on lower case bottom guard plate, cover in filling
Explosive.The technology only realizes the circumferential cutting in blasthole bottom hole part to protect reserved basement rock.
In conclusion the development of existing circumferential direction CUMULATIVE BLASTING device related patents is most of based on conventional CUMULATIVE BLASTING
Theoretical and thinking, it usually needs cooperate corresponding cavity liner, destructor complex, be often used for special blasting, in construction work
Skill, cost control, device production etc. still need further to be improved.
Summary of the invention
In order to overcome conventional circumferential CUMULATIVE BLASTING device that need to configure cavity liner and be only used for the limitation of special blasting, this
Invention is based on circumferential slit Detonation waveform modulation technique, and in common industrial explosive column charing detonation, building does not limit number of rings
Circumferential slit air gap cumulative mechanism, generation is different from conventional column charge detonation and is formed by column wave, along powder charge axis shape
At multi-stage annular detonation wave air gap energy-gathering jetting, complex blast waves waveform is generated in ground, is significantly increased impact wave pressure, is drawn
(cutting) effect improves powder charge circumferential direction explosion energy concentration degree and adjacent shot hole powder charge to enhance explosive detonation local failure ability
The interaction of explosion wave, reaching improves broken rock and soil effect and improves explosive energy utilization rate (or blast hole utilizing factor)
Purpose.
The technical solution adopted by the present invention is that: pass through molding (when in high volume using) or artificial joint-cutting (when using on a small scale)
The anti-electrostatic fire retardant PVC pipe with circumferential slit is formed, slit width and spacing are determined according to different lithology.It is risen using non-electrical
Quick-fried system is contemplated that using common PVC tubing.Powder charge should select reasonable pipe internal diameter to match with powder stick diameter when designing.Scene
Charge process is consistent with conventional blast hole projectile filling, it is only necessary to be fixed in hole bottom end with strength adhesive plaster or adhesive tape and it is avoided to fall off.
Slit air gap Mohaupt effect (Slit Gathering Energy Effect) is theoretical basis of the invention, is had
CUMULATIVE BLASTING effect (Gathering energy effect) not in conventional hole powder charge with cavity liner.Circumferential slit air gap
In terms of Mohaupt effect is embodied in following two:
(1) modulating action of circumferential slit shock wave waveform；
Sliding detonation wave along powder column Propagation corresponds to the detonation wave at slit in plane where by circumferential slit
Circumferentially joint-cutting radially freely projects.Since detonation wave is by the way that there are speed differences at slit, high energy is generated outside certain distance
Converging action.The detonation wave assembled at slit contacts blasthole wall surface rock mass first and is converted into shock wave, and intense impact crushes very
Area's palisades, which are corresponded to, to fusing slit forms cutting.At the same time, the detonation wave of pvc pipe tube wall block area, since wave impedance is lost
With the detonation wave to leak at consumption portion of energy, with slit, there are phase differences and intensity difference delay to arrive at hole wall.In addition, slit
When place's detonation wave freely leaks, density and the pressure part at slit of detonation gas product is caused to reduce, so that blocking zone is close
To the area energy transfer occurs for degree with the relatively high detonation product of pressure, further strengthens slit air gap Mohaupt effect.
Different zones detonation wave arrives at the presence of the phase difference and energy difference of blasthole wall, causes it to correspond to and rushes in hole wall rock mass
It hits action intensity and difference occurs.Other than generating compression and tensile stress in Rock And Soil, out of phase impact will be also formed
Shear stress effect caused by wave effect.The complication that different stress wave phases interact and (interfere and be superimposed) in rock mass, promotees
Into the breakdown strength for applying quick-fried rock mass.
(2) influence of the circumferential slit to detonation gas；
A large amount of high temperature and pressure detonation gases that explosive detonation generates can follow the very fast outside spray of detonation wave closely at circumferential slit
It penetrates to form impact jet flow.In slit face direction, impact jet flow is directly acted in the cutting that shock wave is formed in advance, and wedging is split
Slit is at gas wedging action.Impact jet flow high speed will form local depression area in slit outer rim after projecting and then attract high density energy
Detonation gas in area forms two high turbulences vortex distributions that are adjacent and reversely rotating, causes explosion energy along blasthole diameter
Finally reinforce circumferential air gap Mohaupt effect to assembling.In hole after the completion of explosive detonation, detonation gas uniform pressure distribution is in hole wall, in standard
The further fragmented rock body of static pressure field action.
By the interaction in terms of two above, explosion energy is promoted in blasthole during explosive detonation along slit meeting
Gather and realize cumulative fragmentation, enhances the lateral and whole detritus ability of circumferential slit pack, effectively improve explosive energy
Utilization rate.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is circumferential slit pvc pipe structural map.
Fig. 2 is circumferential slit air gap cumulative Detonation waveform modulation principle figure.
Fig. 3 is small pit goaf circumferential direction slit pvc pipe lead pipe blasting experiment effect picture.
In figure: 1- circumferential direction joint-cutting section pvc pipe；2- circumferential direction joint-cutting；3- gap junction arc；4- seemless section pvc pipe；5- rock
Body；6- blasthole inner wall；7- commercial explosive；8- compressional wave；9- rarefaction wave.
Specific embodiment
In Fig. 1, circumferential joint-cutting section pvc pipe (1) determines it depending on different situations such as Grades of Surrounding Rock, explosive specification and types
Different circumferential slit (2) spacing and circumferential joint-cutting segment length.There are seams when artificial joint-cutting or batch are moulded for circumferential slit (2)
Between couple arc (3), number and arc length depend on the parameters such as material, wall thickness and the circumferential slit width of selected PVC pipe,
There is necessary rigidity and intensity when ensuring circumferential joint-cutting pipe powder charge.To guarantee the subsequent normal charge of undercut blast hole, pvc pipe
There are the seemless sections (4) of 100~200mm to carry out transition.
In circumferential direction slit air gap cumulative Detonation waveform modulation principle figure shown in Fig. 2, circumferential slit joint-cutting pipe (1) is with by force
Explosive (7) and initiating equipment (only when using bottom hole indirect initiation) are loaded after the back cover of power adhesive tape one end, are packed into and are passed through high pressure
Qualified blasthole (6) bottom hole that wind is washed.In hole explosive (7) detonation after, detonation wave via circumferential slit (2) air gap cumulative action
Afterwards, it is acted on corresponding blasthole (6) hole wall in the form of compressional wave (8), and is converted into shock around blasthole (6)
Rock mass (5) on.At the same time, the detonation wave for corresponding to gap junction arc (3) position, due to gap junction arc (3) material
Reflex and lag behind compressional wave (8), and acted on corresponding blasthole (6) hole wall in the form of rarefaction wave (9).Due to sparse
There are the larger differences on energy level and mechanism of action between wave (9) and compressional wave (8), in the corresponding blasthole (6) of circumferential joint-cutting (2)
It is poor that circumferential pressure is generated on hole wall, enhances and surrounding rock body failure by shear is acted on, especially explosion energy is via circumferential slit
(2) energy level improves after air gap cumulative action, enhances the yield failure effect of corresponding position country rock, and then improves undercut blast hole
Blasting energy utilization rate and slotting quality, and then improve the blasting energy benefit in tunnel and the subsequent detonation via hole of tunnel digging blasting
With rate and overall blasting quality.
In small pit goaf circumferential direction slit pvc pipe lead pipe blasting experiment effect picture shown in Fig. 3, circumferential slit (2) corresponding position
Cutting effect is obvious, and gap junction arc (3) position is not damaged.In addition, observing the dotted intensification of groove depth in cutting end
The phenomenon that (end effect), show on compressional wave (8) and rarefaction wave (9) interface there are the vortex of pulsating quantity interaction and then turn
It twists as complicated Shear turbulence, generates reinforced dotted destruction.
Claims (5)
1. a kind of circumferential slit based on Detonation waveform modulation is without cavity liner air gap CUMULATIVE BLASTING loading method, feature exists
In:
Circumferential slit joint-cutting pipe (1) loads explosive (7) and initiating equipment after using mightiness belt paper one end back cover, is packed into and passes through high pressure
Qualified blasthole (6) bottom hole that wind is washed；In hole explosive (7) detonation after, detonation wave via circumferential slit (2) air gap cumulative action
Afterwards, it is acted on corresponding blasthole (6) hole wall in the form of compressional wave (8), and is converted into shock around blasthole (6)
Rock mass (5) on；At the same time, the detonation wave for corresponding to gap junction arc (3) position, due to gap junction arc (3) material
Reflex and lag behind compressional wave (8), and acted on corresponding blasthole (6) hole wall in the form of rarefaction wave (9)；Due to sparse
There are the larger differences on energy level and mechanism of action between wave (9) and compressional wave (8), in the corresponding blasthole (6) of circumferential joint-cutting (2)
It is poor that circumferential pressure is generated on hole wall, enhances and surrounding rock body failure by shear is acted on, especially explosion energy is via circumferential slit
(2) energy level improves after air gap cumulative action, enhances the yield failure effect of corresponding position country rock, and then improves undercut blast hole
Blasting energy utilization rate and slotting quality, and then improve the blasting energy benefit in tunnel and the subsequent detonation via hole of tunnel digging blasting
With rate and overall blasting quality.
2. a kind of circumferential slit based on Detonation waveform modulation according to claim 1 is without cavity liner air gap CUMULATIVE BLASTING
Loading method, it is characterised in that: circumferential joint-cutting section pvc pipe (1) determines depending on Grades of Surrounding Rock, explosive specification and type different situations
Its different circumferential slit (2) spacing and circumferential joint-cutting segment length.
3. a kind of circumferential slit based on Detonation waveform modulation according to claim 1 is without cavity liner air gap CUMULATIVE BLASTING
Loading method, it is characterised in that: there are gap junction arc (3), numbers when artificial joint-cutting or batch are moulded for circumferential slit (2)
Material, wall thickness and the circumferential slit width parameter of selected PVC pipe are depended on, with arc length to ensure circumferential joint-cutting pipe powder charge
When have necessary rigidity and intensity.
4. a kind of circumferential slit based on Detonation waveform modulation according to claim 1 is without cavity liner air gap CUMULATIVE BLASTING
Loading method, it is characterised in that: there are the seemless sections (4) of 100~200mm to carry out transition for pvc pipe.
5. a kind of circumferential slit based on Detonation waveform modulation according to claim 1 is without cavity liner air gap CUMULATIVE BLASTING
Loading method, it is characterised in that: circumferential slit (2) corresponding position cutting effect is obvious, and gap junction arc (3) position is not by broken
It is bad；The phenomenon that groove depth dotted intensification is observed in cutting end, show exist on compressional wave (8) and rarefaction wave (9) interface
The vortex of pulsating quantity interaction turns to twist the Shear turbulence for complexity in turn, generates reinforced dotted destruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648596.9A CN110243244A (en) | 2019-07-18 | 2019-07-18 | It is a kind of based on Detonation waveform modulation circumferential slit without cavity liner air gap CUMULATIVE BLASTING loading method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648596.9A CN110243244A (en) | 2019-07-18 | 2019-07-18 | It is a kind of based on Detonation waveform modulation circumferential slit without cavity liner air gap CUMULATIVE BLASTING loading method |
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| CN110243244A true CN110243244A (en) | 2019-09-17 |
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| CN201910648596.9A Pending CN110243244A (en) | 2019-07-18 | 2019-07-18 | It is a kind of based on Detonation waveform modulation circumferential slit without cavity liner air gap CUMULATIVE BLASTING loading method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161536A (en) * | 2020-09-25 | 2021-01-01 | 安徽省恒金矿业有限公司 | Blasting device for limestone mine and blasting method thereof |
| CN112393654A (en) * | 2020-11-11 | 2021-02-23 | 中国人民解放军陆军工程大学 | Two-way energy-gathering blasting charge structure of joint-cutting pipe |
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| CN202562373U (en) * | 2012-04-25 | 2012-11-28 | 湖南金能科技股份有限公司 | Multidirectional shaped charge type blasting device |
| CN202582379U (en) * | 2012-05-17 | 2012-12-05 | 山东科技大学 | Cumulative blasting joint-cutting pipe |
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| CN202562373U (en) * | 2012-04-25 | 2012-11-28 | 湖南金能科技股份有限公司 | Multidirectional shaped charge type blasting device |
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| CN208282701U (en) * | 2018-06-06 | 2018-12-25 | 西安建筑科技大学 | A kind of segment algorithm applied to photoface exploision |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161536A (en) * | 2020-09-25 | 2021-01-01 | 安徽省恒金矿业有限公司 | Blasting device for limestone mine and blasting method thereof |
| CN112161536B (en) * | 2020-09-25 | 2022-12-13 | 安徽省恒金矿业有限公司 | Blasting device for limestone mine and blasting method thereof |
| CN112393654A (en) * | 2020-11-11 | 2021-02-23 | 中国人民解放军陆军工程大学 | Two-way energy-gathering blasting charge structure of joint-cutting pipe |
| CN112393654B (en) * | 2020-11-11 | 2022-05-17 | 中国人民解放军陆军工程大学 | Two-way energy-gathering blasting charge structure of joint-cutting pipe |
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Application publication date: 20190917 |
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